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Thread: 12-803 Fuel Pressure Regulator Issues

  1. #1

    Default 12-803 Fuel Pressure Regulator Issues

    I'm using a Holley Blue pump & the regulator to supply fuel for my NOS system.

    The regulator is good for 4.5-9 psi, according to Holley. I'm looking for 5.5 psi.
    When I went to set this up at 9 psi, the regulator was fine, but when I dropped it to 5.5, the needle
    on my setup gauge was bouncing and unsteady and you could here the regulator making a noise.

    I left it as is, but it was still a concern.

    The pump/regulator have never been used until this weekend.

    Any ideas on what to do to fix this fluctuating issue? Thanks.

  2. #2
    Join Date
    Dec 2009


    This may or may not help you, but I thought I should post it anyway:
    (Related Forum Thread)
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

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